An astronaut (from the Ancient Greek ἄστρον (astron), meaning 'star', and ναύτης (nautes), meaning 'sailor') is a person trained, equipped, and deployed by a human spaceflight program to serve as a commander or crew member aboard a spacecraft.

2024年12月25日 · Astronaut, designation, derived from the Greek words for ‘star’ and ‘sailor,’ commonly applied in the West to an individual who has flown in outer space. As of 2022, 587 individuals from 41 countries had gone into orbit; 518 of …

2025年1月29日 · Today there are usually seven astronauts living on board at any given time, from a variety of countries. The first class of NASA astronauts was selected in 1959. They are known as the Mercury 7. Since inception, NASA has selected 360 astronaut candidates: 299 men, 61 women; 212 military, 138 civilians; 191 pilots, 159 non-pilots.

2024年11月12日 · The NASA Astronaut Fact Book provides information on the 360 explorers who have been selected as astronauts since NASA's first class in 1959.

The Astronaut Corps is based at the Lyndon B. Johnson Space Center in Houston, although members may be assigned to other locations based on mission requirements, e.g. Soyuz training at Star City, Russia.. The Chief of the Astronaut Office is the most senior leadership position for active astronauts in the Corps. The Chief Astronaut serves as head of the Corps and is the …

2025年1月24日 · Guion S. Bluford, Jr. was the first African American astronaut. Alan B. Shepard, Jr. was the first American in space. NASA astronauts Kjell Lindgren, Jessica Watkins, and Bob Hines are pictured looking out the SpaceX Dragon Freedom spacecraft’s windows. Nichole Ayers was selected by NASA to join the 2021 Astronaut Candidate Class.

5 天之前 · Williams has been a NASA astronaut since 1998, and Wilmore since 2000. Both have plenty of experience in space. Williams is the former record holder for most spacewalks by a woman (seven) and most ...

The meaning of ASTRONAUT is a person whose profession is to travel beyond the earth's atmosphere; broadly : any person who travels beyond the earth's atmosphere. How to use astronaut in a sentence.

2024年12月25日 · Achieving spaceflight enabled humans to begin to explore the solar system and the rest of the universe, to understand the many objects and phenomena that are better observed from a space perspective, and to use for human benefit the resources and attributes of the space environment.

2023年10月26日 · Click on any of the astronauts’ biographies below to learn about their backgrounds, experiences, and accomplishments. Seventeen astronauts have taken spacewalks during Hubble missions. Thirty-two astronauts flew across six missions to launch, repair, and upgrade Hubble.